Process embossing is a special technical technique used in the surface finishing process of Journal Notebook printing materials. The application of concave convex embossing can give printed materials an artistic effect. The embossing process is one of the commonly used technical techniques in the post printing process of paper packaging. The key purpose is to focus on the surface of the integrated design, highlight the important position of the local area, and have rich layers in the overall structure, increasing a large amount and stronger expressive power; And it is an environmentally friendly process, with no environmental pollution during the processing.
Concave convex craftsmanship is more capable of presenting a strong stereoscopic visual experience and a good tactile sensation
1. The characteristic concave convex embossing process is an environmental protection process, and its processing does not cause environmental pollution. In today's era of advocating emerald green, the application of this technology can highlight the green environmental protection concept of users or publishing units. The use of concave convex embossing in printing materials can give book printing an artistic effect, and the overall structure has rich layers, increasing a large and stronger expressive power. It can replace traditional font styles, color tones, and other forms to showcase the main content, emphasizing the integration of a certain part of the design and highlighting its important position.
2. Material characteristics Template materials may vary depending on the design requirements and total number of packaging prints for different types of embossing templates. Different template materials result in significant differences in product cost, process performance, and printing process count. In the production of concave convex embossing, in addition to choosing a suitable imprint for oneself, it is also very important to use suitable paper to achieve a good embossing effect. The thickness of the paper and the size and texture of the surface will affect the main expression of details. For example, the packaging printing effect of paper containing 25% cotton and paper containing 100% cotton is significantly different.
a. Generally, paper weighing over 180g/m2 is more suitable for embossing, but this is not an eternal standard. If the paper is too thin, it is easy to crack during embossing.
b. A sufficiently thick and resilient paper is the foundation for demonstrating the effectiveness of packaging printing, especially for printing design schemes that must highlight the relief effect.
c. Chemical fiber long paper generally has good ductility, and its resistance to India is better than that of chemical fiber short paper.
d. Recycled environmentally friendly paper is not very suitable for concave convex embossing, because the inherent elements of the paper may cause deviations in the actual effect of different web pages, and it is also prone to edge cracking.
e. If it is a process that requires heating (such as hot stamping), it will greatly increase the probability of paper cracking. Therefore, it is even more important to choose paper carefully. Before four-color printing, it is necessary to conduct relevant inspections to maximize the budget for paper consumption and expenses.
3. Process characteristics
① There is no packaging printing pattern design in the protruding area and its surroundings. The demand for paper depends on the actual graphic design, but paper with light colors, long and strong cellulose fibers is more suitable for the embossing process.
② Leave blank areas during packaging printing, and then highlight them after printing. Template production must strictly comply with regulations, as the template should be slightly lower than the design shape on the floor plan due to slight protrusions at the joint after striking.
③ Hot stamping embossing: Use the embossed pattern hot stamping method, and perform embossing and hot stamping once. In the professional terminology of hot stamping aluminum technology, this type of process is called three-dimensional hot stamping. The template for hot stamping embossing is generally made of copper raw material, which can improve the precision of hot stamping and embossing. In addition, the materials used in notebook printing processes must meet both the physical requirements for hot stamping and embossing. The relative height of the protrusion should consider the paper's toughness and the impact strength that the gold foil can withstand.
